Curated OER
Natural Indicators: How Do They Work?
Students describe characteristics and common uses of acids and bases. They describe the role of natural indicators in the chemistry of acids and bases after testing and making observations on a variety of plant extracts. Students observe...
Curated OER
Acid-Base Indicator Paper
Middle schoolers are able to prepare and use pH indicators in paper form. They find out the color of the indicator paper plus test solution may change with time. Students use red cabbage to use for the indicator.
Curated OER
Chemical Equilibria
For this chemical reactions learning exercise, learners determine how mixtures shift toward reactants or products to reach equilibrium. For given reactions, students determine how concentrations will change when adding or removing gases...
Curated OER
Chemical Reactions
In this chemical reactions worksheet, students determine what happens when specific stresses are applied to a reaction. Students calculate the equilibrium constant with respect to pressure. This worksheet has 20 problems to solve.
Curated OER
Establishing a Baseline Ecology of a Creek Ecosystem
Students investigate the physical, chemical and biological parameters necessary to establish an ecological baseline. Establishing an ecological baseline not only shows the ecological characteristics of a creek but makes the possible...
Curated OER
Chemistry Worksheet-Equilibrium
In this equilibrium worksheet, students solve twenty problems including determining the effects of various stresses on chemical reactions, calculating equilibrium constants, determining heat of reactions and writing expression for...
American Chemical Society
Curious Crystals
Crystals are more than meets the eye! Can learners tell them apart simply by observation? As they examine five samples with a magnifier, they find that appearance alone is not enough. This serves as an introduction to a mini unit on...
Curated OER
The Blue Bottle: An Example of Teacher-Guided Inquiry
Learners observe a demonstration in which a bottle containing a colorless solution is mixed, turns blue, then becomes colorless again. They record observations, form and discuss hypotheses, and draw a conclusion based on the evidence.
Curated OER
Gumdrop Crystal Models
A great way to learn about molecular structures is to make a model. Gumdrops and toothpicks are used to construct crystal models. The models are based on theories of crystal shapes that occur because of positive and or negatively charged...
Curated OER
EarthTrek Gravestone Project
Students explore the effects of acid rain. In this acid rain lesson, students investigate the effects of the weathering from acid rain in different places. Students visit cemetaries to collect data about the effects of acid rain on the...
Space Awareness
Transforming Water Into Acid ... And Back
Greenhouse gases affect marine wildlife in life-threatening ways. Through experimentation, your classes explore the acidification of water from the main greenhouse gas carbon dioxide. As they introduce carbon dioxide to water, a pH...
Nuffield Foundation
Investigating the Effect of Temperature on the Activity of Lipase
How does temperature affect lipase activity? Young scholars conduct an experiment to collect data on the interaction of lipase at different temperatures. They add lipase to a solution of milk, sodium carbonate, and phenolphthalein and...
Curated OER
Oxidation of Ethanol to Ethanal
Here is a laboratory exercise where chemistry masters carry out an oxidation reaction to change ethanol into ethanal. They compare the original alcohol to the resulting aldehyde by forming a precipitate. Definitely aimed at learners...
Virginia Department of Education
The Colligative Properties of Solutions
How can you relate colligative properties of solutions to everyday situations? Pupils first discuss the concepts of density, boiling and freezing points, then demonstrate how to accurately determine the boiling and freezing point of...
Curated OER
pH Potential
Students experiment to determine the positive and negative impacts of human activities on environmental change. They examine how physical and biological processes such as decomposition affect soil characteristics while looking at the pH...
Curated OER
AP Chemistry-Chemical Kinetics
In this kinetics activity, students find rate laws of reactions, they determine rate constants, they find rate-determining steps of reactions, they find half-life's of reactions and they determine the overall order of reactions.
Curated OER
Bacteria Change Earth's Atmosphere
Tenth graders organize information to explain how photosynthetic bacteria contributed to climatic changes that happened on Earth. Students create a timeline by using a storyboard to tell the story of the change.
Curated OER
Acids And Bases -- Universal Indicator
Eighth graders design and perform an experiment that uses a Universal Indicator Color Guide to measure the strength of acids and bases. They also determine happens when acids and bases are mixed together. They decide which of three...
Virginia Department of Education
Mystery Iron Ions
Young chemists perform an experiment to determine if a compound is iron (II) chloride or iron (III) chloride. Then they determine the formula, balance the equation, and answer analysis questions.
Curated OER
Acids And Bases
In this acid and base chemistry worksheet, students solve 25 clues in a crossword puzzle based on the pH of common household solutions and common names of chemical compounds.
Michigan Sea Grant
What's in This Water?
Pupils investigate the biological and chemical characteristics of water to determine where purple loosestrife occurs. They create data sheets to record water quality tests in several locations and work in groups to conduct the water...
Curated OER
Breathing Victory
Learners discuss anaerobic respiration and how it relates to sprinting. After discussion of related processes, students create a brochure that explains the complex processes behind every muscular interaction.
Curated OER
Starch is Everywhere
In this science activity, students add a few drops of iodine solution to each of 10 substances to determine if they contain starch. The iodine will turn blue if the item contains starch.
Curated OER
Acid, Base, or Salt?
In this acids and bases worksheet, students read about the differences between acids and bases and then complete a table comparing the characteristics of both. Then students determine if the given statements describe an acid, base, or...